11727985 has 8 divisors (see below), whose sum is σ = 14095656. Its totient is φ = 9367680.

The previous prime is 11727971. The next prime is 11728007. The reversal of 11727985 is 58972711.

It can be written as a sum of positive squares in 4 ways, for example, as 976144 + 10751841 = 988^2 + 3279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11727985 - 2⁷ = 11727857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2677 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (1761957).

Almost surely, 2^11727985 is an apocalyptic number.

It is an amenable number.

11727985 is a deficient number, since it is larger than the sum of its proper divisors (2367671).

11727985 is an equidigital number, since it uses as much as digits as its factorization.

11727985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683.

The product of its digits is 35280, while the sum is 40.

The square root of 11727985 is about 3424.6145768539. The cubic root of 11727985 is about 227.1997246017.

The spelling of 11727985 in words is "eleven million, seven hundred twenty-seven thousand, nine hundred eighty-five".